checker: parallelism doesn't work

tunnel-checker.sh

@@ -13,8 +13,7 @@ CNT=$(curl -s https://adlin.nemunai.re/api/ips)
 echo "${CNT}" | jq -r '. | keys | .[]' - | while read sid
 do
     IP=$(echo "${CNT}" | jq -r '.["'$sid'"].wg' -)
-    if [ -n "${IP}" ]
-    then
+    [ -n "${IP}" ] && (
 	echo -ne "\n${sid}: "
 	ping6 -q -c 1 -w 1 "${IP}1" > /dev/null && {
 	    echo -n "PONG "
@@ -57,10 +56,8 @@ EOF
 EOF
 	    fi
 	}
-    fi &
+    )
 done
 
-sleep 42
-killall openssl
 
 done